ViewSonic VG910S Service Manual - Page 14

Digital Mode 1 2 3 4 5 6 7 Signal name symbol TEXT mode TEXT mode VGA VGA VESA-VGA VESA-VGA VESA-VGA H-frequency (kHz) 31.468 31.469 31.468 31.468 37.5 37.862 43.269 V-frequency (Hz) 70.087 70.087 70.000 59.941 75 72.807 85.005 Pixel rate (MHz) 25.175 28.322 25.175 25.175 31.5 31.501 36.000 H-sync Ths 96 108 96 96 64 40 56 H-back porch Thb 48 54 48 48 120 128 80 Count num (H-total) Thd 800 900 800 800 840 832 832 H- front porch Thf 16 18 16 16 16 24 56 V-sync Tvs 2 2 22 3 3 3 V-back porch Tvb 60 35 35 33 16 28 25 Count num (V-total) Tvd 449 449 449 525 500 520 509 V-front porch Tvf 37 12 10 6 1 9 1 H-sync. Polarity Positive Negative Negative Negative Negative Negative Negative V-sync Polarity Negative Positive Negative Negative Negative Negative Negative H-resolution (dots) 640 720 640 640 640 640 640 V-resolution (lines) 350 400 400 480 480 480 480 Signal name H-frequency (kHz) V-frequency (Hz) Pixel rate (MHz) H-sync H-back porch Count num (H-total) H- front porch V-sync V-back porch Count num (V-total) V-front porch H-sync. Polarity V-sync Polarity H-resolution (dots) V-resolution (lines) 8 9 Symbo IBM-8514A SVGA l 35.156 37.879 56.250 60.317 36.000 40.000 Ths 72 128 Thb 128 88 Thd 1024 1056 Thf 24 40 Tvs 2 4 Tvb 22 23 Tvd 625 628 Tvf 1 1 Negative Positive Negative Positive 800 800 600 600 10 SVGA 48.077 72.188 50.000 120 64 1040 56 6 23 666 37 Positive Positive 800 600 11 SVGA 46.875 75.000 49.500 80 160 1056 16 3 21 625 1 Positive Positive 800 600 12 SVGA 53.674 85.061 56.250 64 152 1048 32 3 27 631 1 Positive Positive 800 600 13 XGA 14 XGA 48.363 60.004 65.000 136 160 1344 24 6 29 806 3 Negative Negative 1024 768 56.476 70.069 75.000 136 144 1328 24 6 29 806 3 Negative Negative 1024 768 ViewSonic Corporation Confidential - Do Not Copy VG910s/b 11